Spanish mobile operator Telefonica has partnered with Microsoft in a bid to boost Windows Phone 8 adoption. The two companies plan to launch an “enhanced marketing effort” that will fight back against “the current duopoly” of Android and iOS.

Yesterday we showed you the ZTE Open, the first entry-level smartphone running Mozilla’s new Firefox OS. Other companies, like Sony, are planning to release Firefox OS phones as well. Mozilla has been trying to get the word out at Mobile World Congress in Barcelona.

During a recent talk at MWC, Mozilla CEO Gary Kovacs touted Firefox OS as a new platform to disrupt Android and Apple’s hold on the industry.

Although Mozilla has stated that it won’t produce hardware for its upcoming Firefox OS, the company has teamed up with Spanish startup Geeksphone to offer a pair of developer devices. Called Keon and Peak, the devices are designed to provide developers with the opportunity to “tap the future of mobile” and get to grips with the platform that will soon be trying to steal marketshare from Android and iOS.

Mozilla is working on a new smartphone operating system called Firefox OS that hopes to compete with Android, iOS, and Windows Phone. The project was first announced back in 2011, and earlier this month, it was reported that Mozilla had made TCL Corporation its hardware partner.

It’s still early days for Firefox OS, but if you’d like to see what Mozilla has in store, you can now run the platform on your Mac using a Boot2Gecko (B2G) “nightly” build.